Chuck-actuating device.



B. M. W. HANSON.

CHUCK ACTUATING DEVICE.

APPLICATION FILED MAB..27, 1905.

Patented Dec. 1, 1908.

5i/fesses.'

UNTTED STATES PATENT OFFICE.

BENGT M. w. HANSON, or HARTEORu CJQNNEQTIQUT; ASSLGNOB'TO PRATT e WHTTNEX QQMPANY, or HARTFORD, OON-NECTIQUT, A CORPORATION or NEW JERSEY.

CHUCK-ACTUATUGL DEVICE'.

speeie'ceeqnof Letters retient.V

rammed Dec. 1,y 190e.

Anuman mea-M1127, 1905. semi No. 252,351..

To all whomt may concern: Be it known that I, BENGT MAeNUs WIL- HELM HAJQSON, aeitizen of Sweden, residing at Hartford', in the county of Hartford and v State of Connecticut, have invented certain new andV useful Improvements in Chuck- Actuating Devices, of which the following is a. specification.

This invention relates tolchueks designed more particularly for use with metaal-work` ing machines, although `it isfnotv4 limited in Scope off employment. y

In chucks as ordinarily: constructed, and

. especially those of what is known as the f collet variety diiculty is frequently experienced in causing the chuck-jaws firmly to engage the stockV and to hold the same withoutdanger ofslippa-ge, andithis is par" ti'eularly noticeableI -when'f -unevenn'ess occurs in. the-:surface .o' the `stock engaged "by/athen' jaws..

My invention is designedftoovercomede-- '.fee-ts -heretofore existing and-to provide a chuck of great utility in the grasping or holding line.

Primarily the objectl of the invention is 'the provision in connection with usual means for.; actuating the chuck-j aws, of auxiliary: devices-- for applyingadditional pres -sure to said jaws should the stock not be f -further object off-the inyention iss thei provision in connection with eltiuckj-ac tuatmgspindle of auxiliary devices' for imparting-additional' clamping action to said sp1-n le.

Affurther object .ofy the invention isy theprovision in conneetigmv with a chuck-spindle and chuck of a thrust-cap rigid with the live-spindle, a device mounted for swinging movement 'on fthe thrust-cap, means carried by the thrust-cap for actuatlng said device,

and means for conyeying the pressure'exerte'd'by' the device-t'fthe chuck-spindle.

Other objects oftheinvention will bel hereinafter set, forth.

#In theaccompanying drawings, Figure 1 isa; longitudine I, verticalsection 'of a chuckspindle-and chuck, and' of means for rotatingl thefsame, showing-.my invention embodied-therewith. 'Fi :2-isa,sideelevatiom is,-a;..side elevation` of tliedrewgin'fleve de; tached from" the thrust-cap onl the spindle; andFigf. 4s is alongitudinall vertical-section i of the thrust-cap, draw-in lever, and annulus forced by said lever against an abutment on the chuck-spindle.

Like numerals designate similar parts throufghout the several views.

Re designates the pillow-'blocks of a head-stock, in bearings of which the tubular-,spindle 2 isjournal'ed, said spindle having at its forward end an enlarged'head 3, provided with the usualweanring'll, for a-purpose hereinafter stated. A

For rotating the spindle a gear or pulley 5 maybe secured thereto in the usual manner. Located within the spindle 2 is a draw -inl war '-endIa-t 7 to engage eiternal'threads 8,

301i' a. split collet 9, said collet. having a con-` erring to the drawings, the numeral 1 spindle 6, internally threaded at its for-L tical' surface atf-itsfree-end adapted' to'be-,enf-

fgageldby the wear-ring'- 4.-. At? its" 'rear eir-F l;tiremity"'the:draw-inU spindle`A 6 is provided manipulated, saidhandswheel being keyed at `411 to saidl spindle, andthe hub of the same bearing at its inner end against a collar or abutment 12 rigid with the chuckspindle. Surrounding the chuck-spindle is A,a loose stimulus-13, the purpose of which will.

be. hereinafter described.`

Designated; by llt-is; a thrust-cap orfblock;

tothereahiid othespindle-2, and is pros4 vided withoppositel'y-disposled 'extenslons 141. In'the thu'stfcap is mounted al thread-V fed bolt 1'6` having4- an'iangul'ar head l16 to* v `which a wrench may he'v applied for actuing-face to receive the head of the bolt 16,

asshown in Figs. l, 2, and 4. This draw-in lever is enlarged on each side at' 20', and" :.rigid with the inner side of each enlargement isa lfuga21. Lateral external extent? ,tensions is atrunnion, 23;," the y trunnions fing fitted in the 'bearings 17 of the plates 7 at itsfree end. Screws 18 are 17. Said draw-in lever 19 surrounds the spindle, as'shown in Fig. 1, and by dotted 'I that a powerful leverage is exerted upon thering and draw-in spindle when the screw 16 is actuated, and the chuck will be compressed with great force upon the stock. A

pin 25 entering a groove 26 prevents independent rotation of the chuck 9. a

In the operation of the inventlon the collet 9 is first closed upon the stock in the villustrated in Fig. 1.

usual manner by grasping the hand-wheel 10, and rotating the draw-1n spindle 6, a

plain bearing-surface of said collet engaging.

the usual wear-ring 4 in the spindle 2, as Should the power applied by the draw-in spindlebe insuiiicient to cause the chuck-jaws firmly to engage the stock and to rotate the same without danger ofslippage, /it becomes necessary to apply auxiliary power to said draw -in spindle, and this is accomplished in the following manner. As illustrated in Fig. l, and as before stated, the draw-in lever 19 surrounds the spindle 6, and its extension 20 is in engagement with the head 16 of the screw 16, while the lugs 21 bear against the annulus 18. It will, therefore, be seen that when the stock is not firmly held bythe chuck, additional closing power may be applied'to' said chuck by rotating the threadedbolt 1 6, and thereby forcing the pivoted draw-1n lever to therear, and causing its lugs 21 to bearwith greater force against the annulus`13, and as said annulus is in engagement with the collar 12 of the drawin spindle it follows that great power may be applied to said spindle to cause the chuckjaws irml to grasp the stock.

While t e draw-1n lever and the other parts of the invention are shown as of particular form, it. is distinctly to be understood that changes may be made therein without departure from-the invention.

means diiierent from the screw may be em- So too,

' ployed for actuating the draw-in lever to impart an auxiliary pressure movement to the chuck-spindle. may also be employed as substitutesV for the chuck shown if desired. l

Having thus described my invention, what I claim is. v

l. The combination, with a main spindle, and with a chuck and its spindle, of means for preliminarily closing said chuck bearings carriedby the main spindle' an auxiljiary chuck-closer journaled in sal-d bearings and surrounding the chuck-spindle; and

Chucks of other forms means'also carried by the lmain spindle for actuating said auxiliary chuck-closer to impart additional pressure to the chuck-jaws.

2. The combination, with a rotary main spindle, of a thrust-block rigid with said spindle; a chuck and its vspindle mounted within the main spindle; means for preliminarily closing said chuck; a draw-in lever pivoted to the thrust-block, and surrounding the chuck-spindle; means carried by the main .spindle for actuating said draw-in lever; and means actuated by said draw-in Ilever for operating the chuck-spindle.

3. The combination, with a tubular spinl dle, of a chuck-actuating spindle mounted in said tubular spindle; a chuck; a thrustblock rigid with the end of the tubular spindle; an annular draw-in lever pivoted to the thrust-block; means operated by said llever for imparting an auxiliary closing movement to the chuck-actuating spindle; and means carried by the thrust-block for actuating said lever.'

4. The combination, with a spindle, of a thrust-block carried at the inner end thereof; a chuck; means for imparting a preliminary closing movement to the chuck; a device pivoted to the thrust block forimparting an auxiliary closing-movement to the chuckactuating means; and a screw carried by the thrust-block, one end of the screw bear- 'ing against said device.

block, said lever surrounding the chuck-acv tuating spindle; means connecting said lever and saidchuck-actuatin spindle; and means lcarried by the thrus-tlock for actuating said lever.

7. The combination, with a-tubular drawin spindle and its chuck, of a tubular spindle in ,which said parts are mounted; a thrust-block rigid with the tubular spindle; an annular lever pivoted to the thrust-block, and surrounding the draw-in s indle; an abutment on the draw-in spind e; a ring surrounding the draw-in spindle and engaging the abutment; lugs carried bythe annular lever, and bearing against the ring; and a device carried by the thrust-block for actuating the annular lever. f

8. The combination, with a draw-in spindle, of a chuck actuated thereby; a tubular spindle in which the draw-in spindle and chuck are mounted; a thrust-block rigid with said tubular spindle; an abutment on the 1n spindle.

9. The combination, with a tubular spindle; of a draW-inspindle; a chuck actuated b Ysaid drawin splndle; an annular thrustbibck rigid with the tubular spindle, and

having bearings; an annular lever having` vtrunnlons mounted 1n said bearlngs, sald lever surrounding the draw-in spindle, and being provided with internally-projecting lugs; a ring surroundin the draw-in spindle; an abutment on Sai ldraw-in spindle to receive the thrust of the ring; and means carried by the thrust-block for actuating the annular lever.

i 10. The combination, with a tubular spindle, of adraw-n spindle; a chuck actuatedv by said draw-in spindle; a thrust-block rigid with said tubular spindle, and having extensions; an annular lever having trunnions mounted in bearings of said extensions, and

also` having inwardly-projecting lugs; aring.

loose on the draw-in spindle; an abutment on said` draw-in spindle for receiving the thrust of the ring; and a bolt threaded into the thrust-block, and one end-of which bears against the annular lever.

' In testimon whereof I alix my signature in presence o Itwo Witnesses.

BENGT M. W. HANSON. Witnesses:

' v WM. H. BLODGETT, Jr.,

FRANcEs-E. BLoDGE'rr. 

